We demonstrate a miniature, fiber-coupled optical tweezer to trap a single atom. The same
fiber is used to trap a single atom and to read out its fluorescence. To obtain a low
background level, the tweezer light is chopped, and we measure the influence of the
chopping frequency on the atom's lifetime. We use the single atom as a single-photon
source at 780 nm and measure the second-order correlation function of the emitted photons.
Because of its miniature, robust, fiber-pigtailed design, this tweezer can be implemented in a …